Apparatus for precipitating injurious fumes from smelter-gases.



PATBNTED DB0. 8, 1903.v

R.' BAGGALEY. APPARATUS PoR PRESIBITATING INJURIQUS SUMBS PROM SMELTBR GASES.

APPLOATION FILED FEB. 7. 1903.

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PATENTBD DBG. a, `1903.

No. 746,236. A

' R. B'AGGALEY. APPARATUS PGR PRECIPITATING INJURIOUS PUMES PROM SMELTER GASES.

APPLICATION FILED FEB. 7. 1903'.

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'me nofws Ferias co. PnoTaLlYuo., WASH PATENTED 1350.8. 1.903.

R.- HBAGGALEY. PITATING INJURIOUS FUMES FROM SM BLTER GAI-SES.

APPARATUS PoR PREGI APPLwATIoN FILED FEB.. 7. 1903. 4 No MODEL. s sHEBTs'sHEETs.'

R 0 T N E V m WITNESSES we uonnys ruins co. PHOTO-uma., WASHINGTON, u. c.

Patented December 8, 1903.

UNITED STATES .PATENT OFFICE.v

RALPH BAGGALEY, oFvPITTsnURe, PENNsYLvANIA.

APPRATUS FOR PHECIPITATING lNlURIOUS FUMES FROM SMELTER-GASES.

SPECIFICATION forming partof Letters Patent No. 746,236, dated December 8, 1903.

l Application filed February 'A7, 1903. Serial No. 142,341. (No model.) l

To all whom it mwy'oonoern: I

Beit known that I, RALPH BAGGALEY, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Apparatus for Precipitating Inj urious Fumes from Smelter-Gases, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- I Figure l is a side elevation of my apparatus. Fig. 2 is a plan view thereof. Fig. 3 is a side elevation of part of the apparatus on a larger'soale. Fig. 4, which is shown as a continuation of Fig. 3, is -a vertical longituof Fig. 2.

dinal section on the line IV IV of Fig. 2. Fig. 5 is a vertical cross-section on the line V V Fig. 6 is a vertical longitudinal section illustrating a modification. Fig. 7 is Va vertical cross-section on the lines VII VII of Fig. 6; and Fig. 8 is' a sectional view, on a larger scale, showing one of the screen-rollers and the means for cooling it.

My invention relates to an apparatus whereby the obnoxious and injurious gases contained in the fumes from smelters maybe precipitated with the greatest economy, utilizing as filters and precipitating-surfaces vegetable growth of the most abundant and cheap est form at the point where the smelting'plant may be located.

By interposing a filtering-surface that is constantly'kept moist in the ilue of a smelting-plant subject to the draft of the ordinary stack or au'induced-dr'aft the free sulfur, sulfur dioxid, a portion of the arsenic, together with the antimony, lead, &c., Will be precipitated on such surface or' surfaces, and the fumes from the smelting process lmay there after be allowed to escape into the atmosphere without injury to vegetation and without polluting the Waters of the district.

ably used on all of them, although a largel proportion of the contained arsenic will be mechanically precipitated, together with the sulfur, iron, antimony, dac., byusing on the screen pure water alone.

The substance utilized 'npracticing my invention will be regulated by conditions at- `various points. #cated at or near the sea-coast-for instance, yon Puget Sound, where vast quantities of vThus when a smelter is lo-v kelp or seaweedare available-this material may be utilized to advantage,inasmuch as it is cheap, contains the requisite moisture within itself, and it is st/ronglyV alkaline. At inland points straw, hay,swapfgasses,rushes, Willows, the boughs of trees, and shrubs, particularly of the conifera family, as well as some varieties of the cactus, may be utilized. In the latter cases, however, it will be necessary to supply water or alkaline solution into 'the hoppers with thematerlal.

In an ordinary smeltingfurnace having a `capacity of three hundred and fifty tons of ore Ain twenty-four hours'it will be necessary to precipitate from the fumes in each twentyfour hours from fifty to seventy-flve tons of impuritics,'according to the character of the ore under treatment. From ou`e to three ltous of straw or other material will be ample to provide the requisite condensing-"surfaces, andthe economy of thisprocessfwill therefore be apparent to those skilled in the art.

It is also of the utmost importance as a measure of economy that handling of the material be avoided and that this bev accomplished entirely, or nearly so, by macliinerv. This I effect by my apparatus, which l will now describe.

As shown iu Figs. l to 5, 2is a chamber through which the gases pass on their way from the smelter to thestack 3. 'In this chamber is a series of vertical columns 4, the sides of which are formed of perforated tiles or bricks, having passages 5, upwardly inclined from the interior to prevent the escape of the filtering material while permitting free travel to the.

gases. Each column contains a double vertical series of driven rollers 6, arranged to feed the tiltering material downwardly through the column and to constitute racks or frames therefor. These rollers are driven by chains to the gases as rapidly as the screen becomes clogged by precipitation of impurities. Iron is quickly attacked by the sulfur fumes, and I therefore employ rollers preferably made of seamless brass, and to prevent them from being heated and at. the same time to reduce vthe temperature of the screen of filtering inaterial I preferably make them hollow, as shown in Fig. 8, and provide them at the ends with swiveled water connections 8, so that constant streams of water may be maintained through them. At the upper end ot each column is a feed-hopper il, with feed-rollers 10, and at the lower end is a conveyer l1, which may be a screw conveyer, Fig. 5. At an intermediate point or points of the column are water-supply pipes l2, by which the screen of filtering material may be wet with water or alkaline solution. Pipes l2 are preferably arranged to discharge water or alkaline solution upon the material in the feed-hoppers.

In the use of my apparatus the vegetable material above described is charged into the hopper 9 and being,y engaged by the feed-rollers l0 is fed downward in the column between the rollers 6 in the form of a mat or screen, which is wetted with water or alkaline solution from the pipes l2, and by these rollers is caused to travel downward at the rate desired to the screw conveyer 1l, by which the waste material is discharged upon a belt or into a car or other convenient receptacle. The fumes from the sinelter pass through the chamber 2 and through the vegetable screens to the stack 3, and the sulfur, iron, arsenic, and other impurities contained in the fumes will be precipitated on the screens and will be carried downward thereby. The rollers crush in a measure the precipitated impuri ties.

Within the scope of my invention, as broadly claimed, the screens shown in the drawings may be substitut-ed by mats of straw or vegetable ber woven or matted together before introduction into the pat-h of the gases; but I prefer the construction shown, as it is cheap and very e'fcient.

It will be seen that the only manual labor required by the apparatus is the arrangement of the Vegetable material in the hoppers 9.

In Figs. 6 and 7Ishow my apparatus modiiied by the use of a belt conveyer 13, which extends beneath the chamber 2 for the removal ofthe waste material delivered from the columns. This belt conveyer passes over suitable supporting-rollers le and leads to a spout l5. The form ot' conveyer shown in Figs. l to 5 is suitable when seaweed and kelp are employed; butthebelt conveyer ot' Figs. (j and 7 is best adapted to use when straw and the other vegetable materials above mentioned are used to constitute the screens.

lVithin the scope of my invention as defined in the claims the apparatus may be modiiied, since what I claim isl. Apparatus for removing impurities from smelter-gases comprising a screen interposed in the path of the gases, and means for causing the screen to travel across the path ofthe gases; substantially as described.

2. Apparatus for removingimpurities from smelter'gases comprising a screen of vegetable matter interposed in the path of the gases, and means for causing the screen to travel across the path of the gases; substantially as described.

3. Apparatus for removingimpurities from smeltergases comprising a screen interposed in the path of the gases, means for causing the screen to travel across the path of the gases, and a liquidsupply adapted to wet the screen; substantially as described.

e. Apparatus for removing impurities from smelter-gases, comprising a screen of vegetable mattei' interposed in the path of the gases, and a series of rollers by which the screen is carried; substantially as described.

5. Apparatus for removingiinpurities from smeltergases, comprising a screen of vegetable matter interposed in the path of the gases, a series of rollers by which the screen is carried, and a feed-hopper for supplying the Vegetable material of which the screen is composed; substantially as described.

6. Apparatus for removing impurities from smelter-gases, comprising a screen of vegeta ble matter interposed in the path of the gases, a series of rollers by which the screen is carried, a hopper for feeding the material of which the screen is composed, and aconveyer at the end of the series of rollers for removing the material of the screen; substantially as described.

7. Apparatus for removing impurities from smclter-gases, comprising a screen of vegeta ble matter interposed in the path ofthe gases, moving mechanism by which the screen is carried, a hopper for feeding the material ot which the screen is com posed, and a conveyer at the end of the series of rollers for removing the material of the screen; substantially as described.

8. Apparatus for removingimpurities from smelter-gases, comprising a screen of vegetable matter interposed in the path of the gases, a series of rollers by which the screen is carried, and a perforated column within which the rollers are set; substantially as described.

9. Apparatus for removing impurities from smelter-gases, comprising ascreen 0f vegetalole matter interposed in the path of the gases, a series of rollers by which the screen is carried, and a perforated column within which the rollers are set, the perfor-ations in the column being upwardly inclined; substantially as described.

l0. Apparatus for removing impurities from smeltengases, comprising a screen of vegetable matter interposed in the path of the gases, and aseries of rollers by which the screen is carried, said rollers being hollow and water-cooled; substantially as described.

ll. Apparatus for removing impurities IIO IZO

moving mechanism by which it is moved, and a feed-hopper to supply themateral for theY screen; substantialy as described. I

In testimony whereof I have hereunto set my hand.

RALPH BAGGALEY.

Witnesses:

GEO. B. BLEMING, H. M. OORWIN. 

